Please answer ASAP

Question 4 The following is an analytical statement of profit or loss and other comprehensive income for Airy Bhd. for the year ended 31 December 2013. RM Sales Variable cost Fixed cost RM 500,000 100,000 200,000 300,000 Earnings before interest and taxes Interest 200,000 30,000 Earnings before taxes Taxes (259) 170,000 42,500 Earnings after taxes 127,500 Required: a. Calculate operating leverage. b. Calculate financial leverage. c Calculate combined leverage